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Subject: Re: difficult position for most amateurs

Author: Will Singleton

Date: 23:56:25 11/29/02

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On November 30, 2002 at 00:17:07, Tom Likens wrote:

>On November 29, 2002 at 17:22:20, Will Singleton wrote:
>
>>[D]2rr3k/1p4p1/1P2b2p/p1Bnpp1q/8/Q1P2PP1/P6P/RB3RK1 b - - 0 26
>>
>>Solution times (amd 1.6ghz):
>>
>>Yace       not in 5 min
>>Crafty     not in 5 min
>>Aristarch  3:48 min
>>Gromit     3:12 min
>>Ruffian    44 sec
>>CM9000     5 sec
>>
>>Seems like the strong amateurs are using pruning techniques that cause the
>>solution to be missed.  Ruffian and Yace have no problem, perhaps they don't use
>>null move in the way others do?
>>
>>How does Chess Tiger do on this?
>>
>>Will
>
>Djinn analysis for this position on a 1.53-GHz Athlon:
>
> 2  00:00:00   0.11  1. ... a4 2. Bd3
> 3  00:00:00   0.09  1. ... Ra8 2. Bc2 Qh3
> 4  00:00:00  -0.05  1. ... Nxc3 2. Qxc3 Rd5 3. Bxf5 Bxf5 <HT>
> 5  00:00:00  -0.05  1. ... Nxc3 2. Qxc3 Rd5 3. Bxf5 Bxf5
> 6  00:00:00  -0.10  1. ... Qe8 2. c4 Nc3 3. Re1 Qc6 4. Bf2
> 7  00:00:01  -0.19  1. ... f4 2. c4 Ne3 3. Bxe3 fxe3 4. Qxe3 Bxc4
> 8  00:00:01  -0.29  1. ... f4 2. c4 Nf6 3. g4 Qh3 4. Qxa5 Bxc4
>                     5. Rc1 <HT>
> 9  00:00:20   -.--  1. ... Nf4!!
> 9  00:00:06  -0.54  1. ... Nf4 2. Qxa5 Ra8 3. Qb5
>10  00:01:37  -2.75  1. ... Nf4 2. h4 Bc4 3. Bxf5 Ne2+ 4. Kg2 Qxf5
>                       5. Rf2 Qg6 6. g4 Nxc3
>
>Interesting position.
>
>regards,
>--tom

Yes, and interesting timing info you show.

Will




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